Edwards ELD500 Series

D135-10-880C - Troubleshooting
Page 97
E34
24 V voltage at MSV board is
too low!
Signal MVPZN on the MSV board is active. 24 V
signal voltage is too low, U < 18.3 V.
Fuse F1 on the MSV board has blown.
Reference voltage UREF on the MSV board XT7/1
is too high, U > 5 V.
DC/DC converter on the MSV board is defective.
24 V power supply voltage of the main power
supply is defective or stressed to much.
E35
Anode-cathode voltage is too
high!
Anode-cathode voltage is > 130 V
MSV board is faulty.
E36
Anode-cathode voltage is too
low.
Anode-cathode voltage is < 30 V.
MSV board is faulty.
Fuse F4 on MSV board has blown.
E37
Suppressor voltage reference
value too high!
Signal MFSZH on MSV board is active. Suppressor
signal command variable is too high.
Suppressor voltage has a short circuit.
MSV is faulty.
E38 Suppressor potential too high!
Suppressor potential is higher than 363 V.
MSV board is faulty.
E39
Suppressor potential is too
low.
Suppressor potential is lower than 297 V.
MSV board is faulty.
E40
The anode potential exceeds
its nominal value by over 10%!
The actual anode potential exceeds its nominal
value by 10%. The nominal value can be displayed
in the service menu.
MSV is faulty.
MC 68 is faulty
E41
The anode potential has
dropped below its nominal
value by over 10%!
The actual anode potential has dropped below its
nominal value by 10%. The nominal value can be
displayed in the service menu.
MSV is faulty.
MC 68 is faulty.
E42
Nominal value of the anode
potential is too high!
Signal MFAZH on MSV board is active.
Anode voltage has been short circuited.
Nominal value of the anode voltage is too high.
Anode voltage is limited to about 1,200 V.
Table 24 Fault finding (continued)
No. Displayed message Description and possible solutions